dma: use ERROR_INT()

The first in a series excising the use of the "return -errno" idiom. This is a
non-standard usage, and in userspace, we have "errno" for delivering side-band
error values. As there have been multiple bugs from not using standard error
return methods like -1+errno or NULL+errno, let's do that.

Signed-off-by: John Levon <john.levon@nutanix.com>
Reviewed-by: Thanos Makatos <thanos.makatos@nutanix.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/test/mocks.c b/test/mocks.c
index b01011e..7121826 100644
--- a/test/mocks.c
+++ b/test/mocks.c
@@ -125,6 +125,7 @@ dma_controller_add_region(dma_controller_t *dma, void *dma_addr,
     check_expected(fd);
     check_expected(offset);
     check_expected(prot);
+    errno = mock();
     return mock();
 }